Mind blank level one gets a lot of accolades, and they are well deserved. Ignoring vengeance, retaliate or even aloof is a powerful thing. The level three version is great in specific scenarios: multiple-person games with annoying amounts of enemies. With this card, you can have the seeker ignore a weak foe for a turn. That means they could get two clues and move towards a guardian, or get to the resign area without dying.

This isn’t the first thing you should level up, because the level one version solves a lot of your problems, but nobody plays mystic without some free upgrade power. It’s especially fun in TFA, where enemies even into the late game do one damage and one horror.

This card is best used when it can be applied to a "succeed by" combo. For example Deduction, Perception, for those with access to Seeker up to 2, Quick Thinking for any with access to Rogue 0. Generally with cards that just need a win, like Deduction, Eureka!, Enraptured, this will also do the trick. Using this card just to get 2 clues for 2 resources, meh - there are better Mystic cards, or your class has access to better in-class cards.

I see a use case for this card I can't think any of the other rogue evade events can do, it can evade an enemy engaged to an ally without having to spend an action to engage, I often use stunning blow for this purpose.

Its not the most reliable way to help someone but I think its worth consideration in a large team, most rogues will be attacking at 7 base here, so effectively at 5 to do what you want to do which isn't horrid.

Beyond that case I think everyone but Tony has better evade events for sheer power.

I've run Promise of Power in a couple campaigns now and I've been really impressed. I don't think you need to have any Curse payoffs in your deck to happily play it. It's just a good deal in its own right.

I think Promise of Power is considerably better than Unexpected Courage, especially on higher difficulty levels. Getting +4 to any test for any investigator at your location is premium--compare cards like Rise to the Occasion and Inquiring Mind, which (in my opinion) feature much larger downsides, while only giving +3! With a +4 bonus, even when playing on Expert, you have a real chance at passing a skill test in a weak stat. That's a nice impact for one card, and something like Unexpected Courage is simply not powerful enough to achieve this.

The Wild icons provide a welcome element of flexibility to Mystics who are otherwise focused only on Willpower. Scenarios often feature important non-Willpower tests, which can be awkward for hyper-specialized Mystics. This card is a great answer to that, and of course also has the flexibility to help allies cover for their own weaknesses.

Moreover, a single curse token in the deck is a very small cost. There's a very high chance that it gets discarded on a test that passes anyway (or, less probably, on a test that would have failed anyway.) I will happily take a large bonus to my skill test right now, when I know the test is important and I know the bonus is useful, in exchange for a smaller penalty later, which might come up on an unimportant test, on an important test that I committed a lot to and therefore can succeed on anyway, or simply not come up at all.

Finally, this is Practiced. That's very relevant because Practice Makes Perfect is a great card, significantly above the curve for a level 0 card and well worth building around. Together with Deduction and Perception, this makes a really nice package for investigators like Amanda Sharpe and Daisy Walker.

"Good job team! One clue to go and only 7/12 doom. We did it handsome today. All right, now let's see about this forced ability on Annette... Discard three cards and --gulp--, well that's two witches we didn't need right now. So we add two doom for them, one for Annette, one for the mythos phase. Holy smokes, 11/12! We're barely gonna win this thing... And there's ancient evils. More like Circle Unfun..."

There's a simple way to keep Annette's insane doom acceleration from spoiling your evening. Have someone drag her off the Witches Circle. She'll spawn her sisters at her new location, giving you a chance to kill them before they can get to the witches circle and end your scenario. Or, if you have sufficient health, just let Annette and her coven smack you around for a couple turns while your colleagues clean up the clues. As long as the witches are engaged, they won't move to the Witches Crcle, as per the instruction on Agenda 2a.